N peters



(No Model.)

M. S. ELDON.

CLAMP FOR HOLDING DYNAMO ELBGTRIG BRUSHES WHILE BEING FILED.

No. 337,824. Patented Mar. 16, 1886.

65 f id UNITED STATES PATENT OFFICE.

MAYBERRIE S. ELDON, OF WILLIAMSPORT, PENNSYLVANIA.

CLAMP FOR HOLDING DYNAMO-ELECTRIC BRUSHES WHILE BEING FILED.

SPECIFICATION forming part of Letters Patent No. 337,824, dated March 16, 1886.

Application filed April 1, 1885. Serial No. 160,962. (No model.)

To all whom it may concern:

Be it known that I, MAYBERRIE S. ELDON, a citizen of the United States, and a resident of Williamsport, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Clamps or Devices for Holding Dynamo- Electric Brushes while in the Process of being Filed and Dressed; and I do hereby declare that the following is a full, clear, and exact description of my invention.

The object of my invention is to firmly hold the brush, retaining the several wires of which it is composed in their proper places, and to furnish a guide by which the brush may be readily filed and dressed to the proper angle and shape to adapt it to the face of the commutator of the dynamo. I attain these objects by the device illustrated in the accompanying drawings, in which- Figure 1 represents a side view of the entire device. Fig. 2 represents a front section of the device. Fig. 3 represents the body or bottom piece of the device. Fig. 4 represents the lower surface of a plate, P, adapted to lie upon and cover the grooves in the bottom piece, A.

Similar letters refer to similar parts throughout the several views.

The entire device is constructed of metal.

The bottom piece, A, is in the nature of a box, without ends or top, divided into sections or grooves to fit the sections or divisions of an electric dynamo-brush by the partitions d cl, three such sections being shown in the drawings, and the number usually required. The sides E E are projected outward, to fit and slide within corresponding grooves, f f, in the top piece, B.

The front end (marked 0) of the bottom piece, A, is made of case-hardened steel, and is beveled at an angle to fit the brush to the commutator, being usually an angle of fortyfive degrees.

The rear ends, i t, of the partitions d d are 5 drawn to an edge, to facilitate insertion between the sections of the brush.

The plate P is smooth upon its top, and upon its lower side is provided with grooves g g fitting over the partitions d d, and is of such width and length as to cover the bottom piece, A, except its sides.

The top piece, B, is furnished with bindingscrews S, three being illustrated in the drawings. It is also provided with a handle, h, by means of which it may be conveniently held in a vise, and its sides are projected downward and inward, forming the grooves ff.

The brush being placed in the bottom piece, A, is covered by the plate P, and the bottom piece, A, is then inserted in the groovesff of the top piece, B, and the whole is securely clamped together by means of the screws S S S The beveled edge 0 forms a perfect guide to file and dress the end of the brush to the required angle.

What I claim is- The herein described clamp for holding dynamoelectric brushes while in process of filing and dressing, consisting of the top piece, B, provided with the handle h, binding screw or screws S, and grooves ff, the bottom piece, A, beveled at its front end, divided into sections by the partitions d (I, said partitions drawn to an edge at the rear end, and having its sides extended to fit the grooves ff, and the plate P, having grooves g g, substantially as and for the purposes described.

In testimony whereof I have hereunto affixed my signature in the presence of two witnesses.

MAYBERRIE S. ELDON.

Witnesses:

ARTHUR T. LINDSEY, SETH T. MoOoRMIoK. 

